Fix virtual/override/final usage in Source/web/.

Source/web/EditorClientImpl.h

Index: Source/web/EditorClientImpl.h
diff --git a/Source/web/EditorClientImpl.h b/Source/web/EditorClientImpl.h
index 8e84ab56e680bb31ff7e125e68c1773d2e1a5f14..120c44e230c07f027e54626f8956235c30239de8 100644
--- a/Source/web/EditorClientImpl.h
+++ b/Source/web/EditorClientImpl.h
@@ -42,13 +42,13 @@ class WebViewImpl;
 class EditorClientImpl final : public EditorClient {
 public:
     explicit EditorClientImpl(WebViewImpl*);
-    virtual ~EditorClientImpl();
+    ~EditorClientImpl() override;
 
-    virtual void respondToChangedContents() override;
-    virtual void respondToChangedSelection(LocalFrame*, SelectionType) override;
-    virtual bool canCopyCut(LocalFrame*, bool defaultValue) const override;
-    virtual bool canPaste(LocalFrame*, bool defaultValue) const override;
-    virtual bool handleKeyboardEvent() override;
+    void respondToChangedContents() override;
+    void respondToChangedSelection(LocalFrame*, SelectionType) override;
+    bool canCopyCut(LocalFrame*, bool defaultValue) const override;
+    bool canPaste(LocalFrame*, bool defaultValue) const override;
+    bool handleKeyboardEvent() override;
 
 private:
     WebViewImpl* m_webView;